Heatwave in Mexico causes howler monkeys to drop dead from trees

Mexico is facing one of its harshest droughts, with temperatures hitting 113 degrees Fahrenheit (45 degrees Celsius) on Monday, causing severe water shortages and leading to the deaths of at least 83 howler monkeys in Tabasco due to extreme heat and dehydration.

New report ranks the most polluted places in the U.S.

The American Lung Association says 131.2 million people – that’s 39% of Americans – live in communities with failing grades for levels of pollution. Here's a map of the best and worst.